Pushing method and device for boiler early warning information

Abstract

The invention discloses a pushing method and device for boiler early warning information. The method comprises the following steps of acquiring basic parameters of a preset boiler, wherein the basic parameters comprises a steam pressure value, a steam temperature value and a furnace tube temperature value; determining a saturation temperature value which corresponds to the steam pressure value according to the steam pressure value in the basic parameters, arranging a current distributor in the boiler, and sending a current signal which corresponds to the basic parameters acquired by the current distributor into a preset control system; determining a first temperature difference value according to the steam temperature value and the saturation temperature value; determining a second temperature value according to the furnace tube temperature value and the saturation temperature value; judging whether the first temperature difference value is greater than a first preset threshold value or not, and / or judging whether the second temperature difference value is greater than a second preset threshold value or not; and pushing first early warning information in case of judging that the first temperature difference value is greater than the first preset threshold value and / or judging that the second temperature difference value is greater than the second preset threshold value.

Description

technical field [0001] The invention relates to the technical field of heavy oil thermal recovery control, in particular to a method and device for pushing boiler warning information. Background technique [0002] In the related art, a wet steam generator needs to be used to generate a large amount of steam during thermal recovery of heavy oil. According to the different viscosity of heavy oil in each plant, the corresponding operating dryness is also different. It is generally believed that the higher the dryness, the better the steam injection effect. However, during the operation of the boiler, there are inevitably some impurities in the water quality. When the boiler is overheated, These impurities cannot be dissolved and adhere to the furnace tube. Scaling will cause the temperature of the furnace tube to rise, the thermal efficiency will decrease, and even a tube burst accident will occur in severe cases. [0003] Among them, the traditional North American oilfield st...

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Problems solved by technology

[0004] At present, the boiler body has multiple alarms of various types to protect the safe operation of the boiler. The two alarm thresholds of steam temperature and furnace tube temperature are both set at 350°C. However, in actual work, the working pressure of the boiler during normal operation is Between 5-10MPa, the corresponding saturation temperature is indeed between 263-311°C. The saturation temperature is far from the set alarm temperature. If it reaches the alarm state, the boiler has been seriously overheated for a long time, which seriously damages the boiler tube. and other equipment, reducing equipment life

For example, for a traditional North American oilfield steam injection boiler, the steam temperature (or furnace tube temperature) alarm value is 350°C during operation, and the steam outlet temperature of the boiler is determined by the steam injection pressure, which is affected by the formation conditions, the number of open wells, It is determined by various factors such as the working conditions of the boiler. It is a dynamically changing value. The steam temperature adopts a fixed value alarm. Only when the steam injection pressure reaches 16.52Mpa and the boiler is overheated will the alarm be issued. However, when the boiler is in normal operation, the pressure is below 12Mpa. The control system cannot protect against overheating

In addition, due to the one-to-one correspondence between pressure and temperature, the current steam injection boilers in oil fields have relatively high requirements for instrument accuracy. In field instrument management, if the error is too large due to instrument failure or wrong range setting, regular calibration or employee judgment should be adopted. no valid basis

The boiler plunger pump is a water supply equipment. When the valve plate, spring, packing and other accessories are damaged, the water volume will drop. At present, personnel inspection and video monitoring are used to find faults on site, which is not efficient.

In addition, in the current technology, the on-site boiler is controlled by a single controller (PLC). When the controller or analog module crashes, the safe operation of the boiler cannot be guaranteed.

[0005] Aiming at the technical problem of boiler damage caused by oil field boiler equipment running for a long time in an overheated state in the above-mentioned related technologies, no effective solution has been proposed so far

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